Relay.



WITNESSES:

Patented Mar.8,191"0.

INVENTOR a ATTORNEY ANDREW s GRAHAM coy. wormmmcwmmsns,wAsmNmoN. n c

UNTTED STATES PATENT ()FFTQE.

ALTON E. STEVENS, OF FALL RIVER, IJIASSACHUSETTS, ASSIGNOR, '10INTERNATIONAL ELECTRIC COMPANY, OF FALL RIVER,

MASSACHUSETTS.

TEASSACHUSETTS, A CORPORATION 01E REL A'I.

March 16, 1908.

To (all whom it may concern:

Be it known that LAL'roN E. STEVENS, a citizen of the United States,residing at Fall River, in the county of Bristol and State ofMassachusetts, have invented certain new and useful Improvements inRelays, of which the following is a specification, reference being hadtherein to the accompanying drawing.

Hy invention relates to details of construction of relays, particularlyof the class such as is used in telephone systems, principally as lineand cut-off relays, either in a manual or an automatic system.

This invention is shown and described, but not claimed, in applicationNo. 351,481, filed by me January 9, 1907, of which this presentapplication is a division.

Of the objects of my invention, the following are the most prominent:1st. To construct a relay which is etiicient, and, at the same time,readily accessible for repairs, replacing faulty winding, etc. 2nd. Toconstruct a relay which is compact, and occupies as small an amount ofspace as is possible. 3rd. To provide a construction which permits ofrelays, such, for instance, as a line and a cut-off relay, being readilycombined in pairs. 4th. To provide a construction in which a line and acut-01f relay, combined in a unit, are self contained, and may bereadily removed or replaced in their respective circuits, withoutdisturbing connections. 5th. To provide a construction in which allparts of such combination are readily accessible.

In the drawings illustrating the principle of my invention and the bestmode known to me of embodying the same, Figure l is a rear elevation ofa line and cut-off relay unit, one of the armatures having been removed;Fig. 2 is a plan, one of the relays being in longitudinal section; andFig. 3 is a front elevation of the unit.

Each of the relays illustrated, consists of a core 1, and a shell 2,each being of metal capable of becoming magnetized. The core 1 extendsthrough the end of the shell 2, and is screwed into a support or plate3, thereby clamping the core and shell to the support. A hole 1 extendsthrough the core 1, to receive a rod or tube 5, the said hole 4: beinghushed at each end, 6; the bushing Specification of Letters Patent.

Patented Mar. 8, 1910.

Divided and this application filed Serial No. 421,430.

forming a bearing for the rod 5; and the rod fitting loosely in the saidbushings. A disk of magnetic metal 7 is adjustably secured to one end ofthe rod; the said disk forming the relay armature; the movement of thesaid armature, and hence the rod, being limited by a spring back-stop 8,which is secured to the shell 2. A plug of insulating material 9 isfitted to the free end of the rod 5, and is designed to engage andoperate contact springs, as 10. A suitable winding is placed on the core1 and inside of the shell 2, in the space 11; the ends of the wire beingled out through a hole 12, Fig. 3, through the shell 2 and support 3 tothe face of the said support. This winding is preferably a solenoid,which may be readily slipped into place when the armature 7 and rod 5are removed to facilitate the repairs of a faulty winding. As verylittle strength is required in the rod 5, a tube may be substitutedtherefor, resulting in a lighter moving element; the rod or tube beingpreferably of a non-magnetic metal. It will be evident that when anelectric current is sent through a winding on the core 1, an efficientelectromagnet results, with both poles presented to the disk armature 7,one pole being presented by the core 1, and the other by the shell 2,the said armature becoming thereby attracted, and, by moving the rodthrough the core, causing the required work to be acconr plished at thefree end of the rod.

The contact springs 10, Fig. 3, operated by the rods, are mounted on theface of the plate 3, which serves as a support for the two relays; thesprings of a line relay being shown in Fig. 2. To obtain the requiredlength of springs, operated by each relay, they are mounted adjacent tothe other relay, and the springs are removably secured in slotted blocksof insulation 16. A slot 13 is convenient to assemble the relays, as acircular wrench with a piece to engage the slot, may be fitted over thecore, whereby the core may be readily screwed into the support, or maybe removed therefrom: The magnet coils and relay springs of the tworelay units may be inter-connected, and the leading-out wires from therelay unit terminated in points of a jack 14; the said points being heldin slots in a block of insulating material 15, which is secured to abent piece 17 of the plate The cooperation of the said jack with acorresponding female jack 18, permanently secured to a proper support onwhich the relays are to be mounted, and connected to the propercircuits, serves as a convenient means for inserting or removing therelay unit from its associated circuits. Normally, one of the contactsprings, as 19, Fig. 2-, serves to return the rod and armature to normalposition. If, however, a quicker or stronger return is necessary, aspiral compression spring, as 20, may be mounted on the rod and have abearing on the bushing 6 and the disk 7, thus tending to force the saiddisk from the bushing. A piece of insulating material 21 is set into theplate 3, and extends through the spring 19, which rests, with tension,upon a shoulder of said piece; the next spring resting, with tension,upon the extension of the said piece, to preserve the adjustment of thesprings.

The above described construction accomplishes all of the objects of myinvention, and I desire to protect the same in the broadest mannerlegally possible.

.Vhat I claim is Two relays mounted side by side, and secured to acommon base; each relay being composed of a shell and a core oi magneticmaterial; a removable solenoid for said core; a hole longitudinallythrough said core; a suitable opening in said shell through which may beled electrical connections for said solenoid; a rod of non-magneticmaterial, free to be moved in said hole; an armature secured to the freeend of said red; the opposite end of said rod protruding from said core;two sets of contact springs; each set of contact springs being operatedby its individual relay armature and rod, and being adjacent to theother relay; and jacks, for electrical connections; all designed for thepurpose of combining the entire apparatus in a self contained removableunit.

In testimoi'iy whereof I allix my signature in presence of twowitnesses.

ALTON E. STEVENS.

Witnesses Fairness J. V. Danny, E. F. UNmo.

